A travel trailer is a self-contained camper designed for long excursions or for short-term living quarters. When parked in a primitive area with no electricity, the trailer’s 12-volt accessories (such as lights and water pump) can operate on a limited basis using the trailer’s battery. However, to keep from damaging these 12-volt accessories, your trailer’s power inverter converts 110-volt AC power to 12-volt DC power when the trailer is connected to an external power source. The power inverter also keeps the trailer’s battery charged when the vehicle is connected to external power or to the tow vehicle. If the inverter is faulty, your accessories will not be able to operate.

Step 1

Locate your trailer’s battery, usually at the front of the trailer on the tongue. Remove the battery cover by loosening the nylon strap and lifting the cover off. Set the cover aside.